Many of the species of this genus are now referred to the genus Mertensia, in the article on which we describe Pulmonaria alpina as Mertensia alpina ;P. maritima as M. maritima ; P. paniculata as M. paniculata ; P. sibirica as M. sibirica, and P. virginica as M. pulmonarioides. All the species are hardy herbaceous perennials useful for the front of mixed borders, shrub borders, and so on. They thrive well in ordinary light, rich soil in a sunny site, and are best propagated by division of the roots in March, when they may be most successfully planted, or by seeds sownat the usual time in the summer. We recommend the following, all of which are grown at Kew : Pulmonaria angustifolia.This may be used, on account of its dwarfish habit, in the rock garden. It bears pretty violet flowers in April and May, on plants 9 ins. high. Its variety azurea bears delightful skyblue flowers, and grows 12 ins. high. P. arvernense.This bears pretty purple-blue flowers from April to June, and grows 12 ins. high. P. azurea.This nursery sort is the variety azurea of P- angustifolia described above. P nwntana (Syn. P. mollis). This bears attractive blue flowers from April to June, and grows 12 ins. high. P. officinalis (Common Lungwort). This may be considered the least attractive of all. It is found growing wild in many parts of England, and bears, as many readers will be aware, pink flowers in April and May, on plants 12 ins. high. P. rubra.This is a useful bright red sort blooming in May and June, and growing 12 ins. high. P. saccharata.This is a pretty pinkish species blooming in May and June, and growing 12 ins. high.
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